Improvement in fire-place grates



R. L. MITCHELL. Fire-Place Grate.

No. 197,157. Patented Nov. 13, 1877.

N. PETERS, FHmD-LITIIOGRAHER. WASHINGTON. D C.

UNITED; STATES PATENT QFFICE.

ROBERT L. MITCHELL, OF HUNTSVILLE, ALABAMA.

IMPROVEMENT lN FIRE-PLACE GRATES.

Specification forming part of Letters Patent No. 197,157, dated November13, 1877; application filed September 27, 1877.

To all whom it may concern:

Be it known that 1, ROBERT L. MIToH LL, of Huntsville, in the county ofMadison and State of Alabama, have invented a new and ImprovedFire-Place Grate; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming a part of this specification, in which--Figure 1 is a front elevation, partly broken away; Fig. 2, a verticaltransverse section Fig. 3, a detail of the front back-plate O, and Fig.4 a detail of one of the inner sides.

This invention relates to certain improvements in open fire-placegrates; and it consists in the particular construction of the doubleback and sides, and in the combination, with the inner back and sides,of a detacha ble back-plate for the fire-pot, which operates I as a keyto lock and hold the other parts in proper position, as hereinafter morefully described.

In the drawings, A represents the outer back-plate, which rests againstthe back of the chimney, and to which the outer sides B B are detachablyfastened, the said sides B B occupying a position adjacent to the jambs.

G is the inner, back-piece, which consists (see Fig. 3) of the plate or,having hooks b, supporting-partitions c, and cross-bar d, having hooksc, all of which parts are securely fastened together, and constitute oneof the separate pieces of the grate.

D are the inner sides of the grate, having slots ff, a corner-strip, g,and ribs h upon that portion of the sides forming a part of thefire-pot.

E is the detachable fire-pot back, which is made in a separate piece,and is provided with perforations and ribs 11.

F is the front or face plate, having lugs j and G is the grate, havinghooks k, which latter grasp the lugs and support the grate.

The mode of constructing my improved grate is as follows: The back A isplaced against the back of the chimney, and the two outer sides B B areplaced next to the jambs, and detachably fastened to the back by anysuitable means, The back 0 is then fastened to the inner sides byextending the hooks of the back through the slots of the sides, and thenadjusting the same into position in the outer casing. The detachablefire-pot back E is then placed with its lower edge upon bar d, and itsrear side resting upon the supportingpartitions 0. Its upper edgereststhen against the lower part of the top plate a and thecorner-strips g, thus lockin g the sides to the back, and securelyholding the whole together. The front F is then placed on, and the gratefixed with its inner edge resting upon a sup port, l, of the bar d, andits sides fastened to the front by means of the hooks k and lugs j.

The back of the fire-pot, it will be seen, is

readily removable, and can be taken out when desired. It is perforated,as shown; but I .may make it plain and solid, or otherwise modify it,according to the character of the draft.

In manufacturing the parts of my grate I shall generally make them ofcast-iron; but the detachable back of the fire-pot may be made ofwrought-iron.

In setting up the parts of the grate the spaces between the outsidecasing and the chimney should be filled in with mortar or soft clay,which would serve to hold the parts rigidly together.

The hot-air chambers of my improved grate are designed to be connectedwith air-pipes having dampers and registers for the purpose of heatingthe upper stories.

Having thus described my invention, what I claim as new is 1. The back0, having hooks e, in combination with the sides D, having slots ff, andthe removable locking fire-pot back E, substantially as and for thepurpose specified.

2. The combination, with the back A and side B, of the inner back 0,consisting of the supporting-partitions 0, the'plate a, and the bar d,having hooks b e, the sides D, having strips g and slots ff, and thedetachable firepot back E, substantially as described.

ROBERT L. MITCHELL.

Witnesses:

W. D. MINTON, W. T. DRYDEN.

